All the people who would order such a thing, all the officers, troops, politicians, et al., involved in disarming citizens have names, and addresses, and drive cars to the store, and take their kids to school.
Their names and addresses will be known, disseminated, and their routines severely interrupted when they start dropping like flies from rifle shots to the head while they try to drop their kids off at school, or get their mail from their mailbox, or go to the store for groceries.
In short order you will play hell finding more tools of the state to take on those tasks.
Sure, lots of people will go down when the swat teams surrounds their house. But that isn’t the end of it. That is just the start.
Thus the “retreat and engage on more favorable terms” strategy.
Swat team may be surrounding the house, but how many armed citizens are surrounding them while they are surrounding an empty house.